Michael Arrington pounding his MySpace sourceWhen TechCrunch, the blog for startup fetishists, published leaked screengrabs of MySpace's just-launched music service, Michael Arrington wrote: "We’ve been pounding our sources for screenshots of the new service for weeks without any luck." Now we know what he meant. A tipster tells us, and another source confirms, that Arrington's been dating Dani Dudeck, MySpace's VP of global communications, for months.We're told Dudeck leaked Arrington not only the MySpace Music screenshots, but also tipped him to a story about MySpace friend-in-chief Tom Anderson's brush with the FBI as a hacker in the 1980s. The article served to burnish Anderson's rather questionable geek credentials. MySpace has helped Arrington's business in other ways besides feeding him stories. The News Corp.-owned social network was a major sponsor of the recent TechCrunch50 conference. Arrington has no issue bragging privately about his relationship with Dudeck. And Dudeck, our source says, has "no issues to sleeping with key influencers." Before Arrington, we hear, the rumor was Dudeck dated MySpace CEO Chris DeWolfe. But don't believe us — let's go to the tape. Check out this clip of DeWolfe and Dudeck together at the Sundance Film Festival earlier this year, caught by Kara Swisher for AllThingsD. The way Dudeck leans in to DeWolfe to stay warm tells you more than any of our anonymous sources. Kara's quippy response — "You don't have to love me" — reminds me of an anecdote my boss once related about Dudeck. The flirtatious MySpace flack accosted him at a conference last year and said, "We really need to work on our relationship." Sorry, Dani — Owen doesn't swing that way.